The catalytic conversion of C2H5SH on protonic molecular sieves, i.e. ZSM-5 with various Si/Al ratios, Ferrierite, Y, SAPO-34, was studied in a gas flow reactor. Ethylene and H2S are the main products, but small amounts of C1-C4 alkanes, C6-C8 aromatics, coke, CS2 and thiophenes are formed. The catalytic behavior strongly depended on both acidic and textural properties of solids. Assuming a pseudo first order kinetic model, the rate constant and the activation energy have been evaluated for all catalysts. Over the, best catalytic material, H-ZSM-5 (Si/Al = 15), full conversion of C2H5SH was achieved at temperature higher than 673 K. Additionally, the catalyst lifetime measured at 823 K was more than 70 h of time-onstream. With C2H5SH/CH3SH mixture, over H-ZSM-5, the conversion of thiols was total at 823 K for at least 11 h. In that case, significant amounts of coke and aromatics were formed, but after the thermal regeneration with air, the spent catalyst recovered the properties of the fresh zeolite. (C) 2014 Elsevier B.V. All rights reserved.